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From "Kochheiser,Todd W - TO-DITT1" <twkochhei...@bpa.gov>
Subject RE: Pelops - a new Java client library paradigm
Date Mon, 14 Jun 2010 14:32:13 GMT
Great API that looks easy and intuitive to use.  Regarding your connection pool implementation,
how does it handle failed/crashed nodes?  Will the pool auto-detect failed nodes via a "tester"
thread or will a failed node, and hence its pooled connection(s), be removed only when they
are used?  Conversely, how will the pool be repopulated once the failed/crashed node becomes
available?

Todd

________________________________
From: Dominic Williams [mailto:thedwilliams@googlemail.com]
Sent: Friday, June 11, 2010 7:05 AM
To: user@cassandra.apache.org
Subject: Re: Pelops - a new Java client library paradigm

Hi good question.

The scalability of Pelops is dependent on Cassandra, not the library itself. The library aims
to provide an more effective access layer on top of the Thrift API.

The library does perform connection pooling, and you can control the size of the pool and
other parameters using a policy object. But connection pooling itself does not increase scalability,
only efficiency.

Hope this helps.
BEst, Dominic

On 11 June 2010 14:47, Ian Soboroff <isoboroff@gmail.com<mailto:isoboroff@gmail.com>>
wrote:
Sounds nice.  Can you say something about the scales at which you've used this library?  Both
write and read load?  Size of clusters and size of data?

Ian

On Fri, Jun 11, 2010 at 9:41 AM, Dominic Williams <thedwilliams@googlemail.com<mailto:thedwilliams@googlemail.com>>
wrote:
Pelops is a new high quality Java client library for Cassandra.

It has a design that:
* reveals the full power of Cassandra through an elegant "Mutator and Selector" paradigm
* generates better, cleaner, less bug prone code
* reduces the learning curve for new users
* drives rapid application development
* encapsulates advanced pooling algorithms

An article introducing Pelops can be found at
http://ria101.wordpress.com/2010/06/11/pelops-the-beautiful-cassandra-database-client-for-java/

Thanks for reading.
Best, Dominic



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